4-(2-Nitro-4-sulfo- or optionally substituted sulfamoylanilino)phenyl-azo-phenyl dyes

ABSTRACT

Compounds of the formula   AND SALTS THEREOF, WHEREIN R is alkyl or sulfoalkyl, X is -OH or -NHR1, wherein R1 is hydrogen, alkyl, alkoxyalkyl, phenyl or substituted phenyl having 1 or 2 substituents wherein each substituent is independently halo, alkyl or alkoxy, EACH Z and each Z&#39;&#39; is independently halo, alkyl or alkoxy, EACH M IS INDEPENDENTLY 0, 1 OR 2, AND N IS 0 OR 1, WITH THE PROVISO THAT THE MOLECULE CONTAINS 1 OR 2 SULFO GROUPS. These compounds are useful for dyeing natural or synthetic polyamide fibres or polyurethane fibres. They exhibit good fastness to light, rubbing, wet treatments, milling, perspiration and, when used in combination with other dyes, catalytic fading.

United States Patent Van Assche et al.

[ 4-(2-NlTRO-4-SULFO- OR OPTIONALLY Primary Examinerl-lenry R. Jiles SUBSTITUTED Assistant Examiner-R0bert W. Ramsuer SULFAMOYLANILINO)PHENYL-AZO. Attorney, Agent, or FirmGerald D. Sharkin; Richard PHENYL DYES E. Vila; Melvyn M. Kassenoff [75] Inventors: Daniel Van Assche, Binningen,

Basel-Land; Hanspeter Uehlinger, [57] ABSTRACT Basel, both of Switzerland Compounds of the formula (XO S) OR [73] Assignee: Sandoz Ltd., Basel, Switzerland and salts thereof, 22 Filed: 06:. 10, 1972 wherein R 1s alkyl or sulfoalkyl, [2i] Appl. No.: 296,441 X is Ol-l or Nl-IR,,

wherein [30] Foreign Application Priority Data R is hydrogen, alkyl, alkoxyalkyl, phenyl or OCI. 13, 1971 Switzerland l4978/7l Substituted P y having 1 0r 2 Substituents wherein each substituent is independently halo, 52 US. Cl. 260/206; 8/41 B alkyl or alkoxy, [51] Int. Cl C09b 29/34 each Z and each 15 Independently halo l y [58] Field 61 Search 260/206 yl each m is independently O, l or 2, and n is 0 or 1, [56] References Cited with the proviso that the molecule contains 1 or 2 UNITED STATES PATENTS sulfo groups. These compounds are useful for dyeing tural or synthetic polyamide fibres or polyurethane 2,879,269 3/1959 Merlan 260/206 3,516,982 6 1970 Dimroth etal. ..260/207.1 fibres- They l P F to l'ght, 3,535,306 10/1970 Altermatt et a1. 260/207.l Wet treatments, mlllmgl persplratlon and, when used 3,663,531 5/1972 Liechti 260/206 in combination th other dyes, atalytic fading.

06 3,685,9 52 8/1972 Renfrew... 260/2 24 Clalms, No Drawmgs FOREIGN PATENTS OR APPLICATIONS 158,260 3/1940 Austria 260/206 275,230 l0/l928 United Kingdom 260/206 1451 May 13, 1975 4-(2-NITRO-4-SULFO- OR OPTIONALLY SUBSTITUTED SULFAMOYLANILINO)PHENYL-AZO-PHENYL DYES The invention provides compounds of formula I,

in which R signifies an alkyl radical of l to 6 carbon atoms or an alkyl radical of l to 6 carbon atoms substituted by a sulphonic acid group, X signifies the group OH or the group NHR in which R, signifies a hydrogen atom, an alkyl radical of l to 6 carbon atoms, or an alkoxy alkyl radical, the alkoxy moeity and alkyl moeity each containing from 1 to 6 carbon atoms, an unsubstituted phenyl radical, a phenyl radical substituted by a halogen atom or substituted by an alkyl or alkoxy radical of 1 to 6 carbon atoms, n signifiesO or 1, and rings A and B, independently, are further unsubstituted or substituted by up to two substituents selected from halogen, alkyl of l to 6 carbon atoms and alkoxy of l to 6 carbon atoms, with the proviso that the molecule contains 1 or 2 sulphonic acid groups, which compounds may be in free acid or salt form. R can also be a phenyl radical having two substituents wherein each substituent is independently halo, alkyl of l to 6 carbon atoms or alkoxy of l to 6 carbon atoms.

The invention also provides a process for the production of compounds of formula I, characterised by alkylating or sulphoalkylating a compound of formula 11,

obtained in conventional manner, for example by a. coupling the diazo compound of an amine of formula Ill,

III

in which X, n and ring A are as defined above, with a compound of formula IV,

in which ring B is as defined above,

b. by condensing an aminoazo compound of formula 7 in which X, n, and rings A and B are as defined above, and, where required, converting any free acid form into salt form or vice versa.

The process may be carried out in conventional manner using, for example, as alkylating agent, a compound of formula R-Y, in which Y signifies the acid radical of an ester or, as sulphoalkylating agent, a sultone. As examples of suitable alkylating agents may be given dialkyl sulphates, e.g. dimethyl and diethyl sulphates, sulin which rings A and B are as defined above, with a compound of formula VI,

in which X and n are as defined above. The above processes (a) and (b) may be carried out- 5 in conventional manner.

Any alkyl or alkoxy radicals in the compounds of formula l are preferably of l to 4 carbon atoms, most preferably of l, 2 or 3 carbon atoms except when R is sulfoin which R signifies a hydrogen atom or a methyl or methoxy group, and R signifies a methyl or ethyl radical,

which compounds may be in free acid or salt form.

British Pat. No. 275,230 discloses monosulphonated The following Examples, in which parts and percentages are by weight and temperatures are in degrees Centigrade, illustrate the invention.

EXAMPLE 1 82.6 Parts of 4-(2"-nitro-4-"-aminosulphonylphenylam1n0)-4-hydroxy- 1 ,1 -azobenzene are stirred into 500 parts of water and 1500 parts of ethyl alcohol, with heating to 60. Then 75 parts of l,2-oxathiolan-2,2-

dioxide are added and the pH maintained at 9-10 by the addition of aqueous sodium hydroxide solution.

The dye is salted out, filtered and dried. it is obtained in the form of the sodium salt, which has the formula,

a N-O s 2 2 N QN N@ o (CH SO Na.

arylazodiarylamines which contain at least one nitro group in the diarylamino radical, together with the use thereof in the dyeing of cellulose esters and ethers. Generally, these compounds give dyeings of insufficient fastness, in particular insufficient light fastness on natural 1 and synthetic polyamide fibres. Surprisingly, however, it has been found that the compounds of formula I, provided by the present invention, give dyeings on natural and synthetic polyamide fibres and on polyurethane fibres which have notable fastness properties. Thus, the invention also provides a process for dyeing natural or synthetic polyamide fibres or polyurethane fibres, which comprises'applying thereto a compound of formula I, stated above.

The compounds may be applied to the fibre, which may, for example, be in yarn, filament or fabric form,

On natural and synthetic polyamide fibres this dye gives dyeings of yellow shade which have good fastness properties.

EXAMPLE 2 40 areadded. The pH is kept atl l-l 1.5 by the continuous addition of a further 270parts of 30% aqueous sodium hydroxide solution. When the pH remains constant the solution is filtered while still hot. The filtercake is washed with 1000 parts of water and dried to give the in conventional manner, for example from neutral to d i h f f th di l f f l weakly acid baths.

NaO S The dyeings have good fastness to light, rubbing, water, sea water, washing, milling, perspiration and chlorinated swimming pool water.

When used in combination with other dyes, in partic- On synthetic and natural polyamide fibres fast yellow ular other anionic dyes, the compounds are not subject to catalytic fading. On polyamide fibres of irregular affinity, the compounds give level dyeings.

The major natural polyamides are wool and silk and the major synthetic polyamides are those produced by condensation polymerisation of dibasic organic acids,

2', and using appropriate starting materials in approximately equivalent amounts, the compounds listed in the following table and having the basic formula:

for example adipic acid or sebacic acid, and hexamethylene diamine, or of w-aminoundecanoic acid or e-caprolactam.

may be obtained, the significances of X, n, R and the nature and positions of substituents on rings A and B being indicated in thetable.

Table No. X Nature and Nature and R sh d position of position of of substituent substituent ing on in the-ring in the ring l i i A R Fibre 3 -OH 1 -ca yellow 1 4 do C H do 5 d 1 2-Methyl -CH do 6 do 1 d0 -C2H5 d0 7 d 1 3-Methyl CH do 8 do 1 d0 '-C2H5 d0 9 d 1 2,3-Dimethy1 -CI+I do 10 do 1 4 2 5-Dimethyl do do 11 do 1 -C H do 12 CH -O 1 -(C do '50 H (CH2)3 3 13 OH 1 do do 14 do 1 2-Methoxy CH do 15 do 1 3-Methoxy do do 16 --on 1 3-Chloro CH do 17 0 -(CH do i; r59 1! 18 0 Z-Methyl H yellow -VSO3H 19 0 3-Methyl do do 20 -NH 1 do do 21 CH -NH- 1 2-Methyl do 22 do 1 3-Methy1 do do 23 -NH 1 d o do 24 NHOC1.1. do d 25 --1-m cn do do -10. X .lature and Nature and R Shade position of position of of dye substituent substituent ing on in the ring in the ring polyamade A R ihrp 26 -NH OCH 1 do do 27 -on i 1 2-Methoxy" f -c n do -5methyl 28 do 1 do -CH do Formulae of representative dyes of the foregoing Examples are as follows:

out, 100 parts of a fabric of synthetic polyamide fibre, for example nylon 6.6, are entered into the bath at 40. The bath is brought to the boil in 30 minutes and held at the boil for 1 hour. At this point 4 parts of glacial g 02 CH3 H0 5 m1 N a acetic acid are added and dyeing is completed in a fur- EXAMPLE 5 EXAMPLE 7 ther 30 minutes at the [3011. The water lost by evapora- N0 cg 80 NH H N ocn 8 tion is continuous] re laced durin d ein On re- EXAMPLE 8 y p g y g moval from the bath the fabric is rinsed with Water and dried. lt is dyed in a yellow shade.

Wool and polyurethane fibres also can be dyed by the above method.

What is claimed is: 60 1. A compound of the formula APPLICATION EXAMPLE A dyebath is prepared with 4000 parts of water, 10 parts of anhydrous sodium sulphate and 2 parts of the dye described in Example 1. After previous wetting (X-O S) n on or a salt thereof, wherein R is alkyl of l to 6 carbon atoms or sulfoalkyl of l to 6 carbon atoms, X is -OH or NHR wherein R is hydrogen, alkyl of l to 6 carbon atoms, alkoxyalkyl wherein the alkoxy and alkyl radicals inde- 10 pendently have 1 to 6 carbon atoms each, phenyl or substituted phenyl having 1 or 2 substituents wherein each substituent is independently halo,

alkyl of l to 6 carbon atoms or alkoxy of l to 6 car- 15 bon atoms,

each Z and each Z is independently halo, alkyl of l to 6 carbon atoms or alkoxy of l to 6 carbon atoms,

each m'is independently 0, l or 2,

n is 0 or 1, and

each halo is independently chloro or bromo, with the 2 proviso that when R is alkyl, X must be -OH and it must be l. i

2. A compound according to claim 1 having the formula foalkyl of l to 6 carbon atoms.

7. A compound according to claim 6 wherein X is -OH, and

n is l.

8. A compound according to claim 3 wherein X is NHR and R is sulfoalkyl of l to 6 carbon atoms.

13. A compound according to claim 1 wherein R is sulfoalkyl of l to 6 carbon atoms, and

25 X iS NHR M M QR or an alkali metal or ammonium salt thereof.

3. a compound according to claim 1 wherein R is hydrogen, alkyl of 1 to 6 carbon atoms, alkoxy- 4O alkyl'wherein the alkoxy radical and the alkyl radical independently have 1 to 6 carbon atoms each, phenyl or phenyl substituted by halo, alkyl of l to 6' carbon atoms or alkoxy of 1 to 6 carbon atoms, and

each halo is chloro.

HOS

4. A compound according to claim 3 having the formula or an alkali metal salt thereof.

5. A sodium salt according to claim 4. 6. A compound according to claim 3 wherein R is sulwherein R isphenyl or substituted phenyl having 1 or 2 substituents wherein each substituent is independently halo, alkyl of l to 6 carbon atoms or alkoxy of l to 6 carbon atoms.

14. A compound according to claim 13 wherein R is monosubstituted phenyl wherein the substituent is in the para position.

15. A compound according to claim 1 having the formula or a salt thereof, wherein R is methyl or ethyl, each Z is independently methyl or methoxy, and m is O, l or 2.

16. A compound according to claim 15 having the 20. The compound according to claim 16 having the formula formula Bo s NH N u R no. NH u== or a salt thereof, or a salt thereof. wherein H 21. The compound according to claim 1O having the R is hydrogen, methyl or methoxy, and g y j formula v u no s rm N==N -(cn -so H v I I 2 3 3 R is methyl or ethyl. or a salt thereof. v T Compound d g t0 clalm 16 l the 22. A compound according to claim 3 wherein X is formula OH 5 A or a l th r of, 23. A compound according to claim 13 wherein each 18. The compound according to claim 16 having the halo is chloro. formula 24. A compound according to claim 22 wherein R is alkyl of l to 6carbon atoms,, a 0 X is-OH, and v n is 1. l

orasalt thereof.

or a salt thereof.

19, The compound according to claim 16 having the formula v 

1. A COMPOUND OF THE FORMULA
 2. A compound according to claim 1 having the formula
 3. a compound according to claim 1 wherein R1 is hydrogen, alkyl of 1 to 6 carbon atoms, alkoxyalkyl wherein the alkoxy radical and the alkyl radical independently have 1 to 6 carbon atoms each, phenyl or phenyl substituted by halo, alkyl of 1 to 6 carbon atoms or alkoxy of 1 to 6 carbon atoms, and each halo is chloro.
 4. A compound according to claim 3 having the formula
 5. A sodium salt according to claim
 4. 6. A compound according to claim 3 wherein R is sulfoalkyl of 1 to 6 carbon atoms.
 7. A compound according to claim 6 wherein X is -OH, and n is
 1. 8. A compound according to claim 3 wherein X is -NHR1, and R is sulfoalkyl of 1 to 6 carbon atoms.
 9. A compound according to claim 8 wherein R is sulfoalkyl of 2 to 4 carbon atoms.
 10. A compound according to claim 8 wherein R1 is hydrogen.
 11. A compound according to claim 8 wherein R1 is alkyl of 1 to 6 carbon atoms or alkoxyalkyl wherein the alkoxy and alkyl radicals independently have 1 to 6 carbon atoms each.
 12. A compound according to claim 3 wherein each m is independently 1 or
 2. 13. A compound according to claim 1 wherein R is sulfoalkyl of 1 to 6 carbon atoms, and X is -NHR1, wherein R1 is phenyl or substituted phenyl having 1 or 2 substituents wherein each substituent is independently halo, alkyl of 1 to 6 carbon atoms or alkoxy of 1 to 6 carbon atoms.
 14. A compound according to claim 13 wherein R1 is monosubstituted phenyl wherein the substituent is in the para position.
 15. A compound according to claim 1 having the formula
 16. A compound according to claim 15 having the formula
 17. The compound according to claim 16 having the formula
 18. The compound according to claim 16 having the formula
 19. The compound according to claim 16 having the formula
 20. The compound according to claim 16 having the formula
 21. The compound according to claim 10 having the formula
 22. A compound according to claim 3 wherein X is -OH.
 23. A compound according to claim 13 wherein each halo is chloro.
 24. A compound according to claim 22 wherein R is alkyl of 1 to 6 carbon atoms, X is -OH, and n is
 1. 